Mamitas is about Jordin, (EJ Bonilla) a cocky but charming Latino firebrand. At home he is a doting grandson who can't seem to please his perpetually cranky father. On the day he's suspended for insulting a teacher, Jordin meets Felipa (Veronica Diaz), a bookish, no-nonsense New York girl who sees past the swaggering fašade. The two immediately embark on an unlikely friendship that inspires Jordin to find out who he really is.

Trapanese comments that "the score is an intimate companion to this coming of age film. [The director] Nicholas [Ozeki] wanted the score to be with our audience, to speak to everyone and to provide another layer of emotion and depth to his film." Joseph further reflects on his experience scoring 'Mamitas' by stating, "Do you remember high school? If you wanted to be cool, you always had to keep your true feelings veiled. Our score pulls back that veil and looks inside, revealing the true strengths and weaknesses of our players, connecting us to them as human beings."

Joseph Trapanese is a Los Angeles based composer, arranger, orchestrator and producer of music for film, television, multimedia, theater and concerts. In 2009, he collaborated with Daft Punk on the critically acclaimed soundtrack for Walt Disney Picture's Tron: Legacy for two years. Released in October 2011, M83's ambitious double LP Hurry Up, We're Dreaming, (called "sumptuously arranged" by Pitchfork and named one of its top albums of 2011) includes Joseph's orchestrations on five original tracks. Alongside Mike Shinoda of Linkin Park he co-composed the score for Sony Picture Classic's action film The Raid: Redemption, winner of the Toronto Film Festival's Midnight Madness Award. Currently he is scoring the animated series Tron: Uprising for Disney XD. Trapanese also remains active composing and producing music for concerts, recitals, off-Broadway plays, and other live performances.